You can add to or remove from this kit as needed. An AOD with a 10 1/4″ tail housing is only 1/4″ longer than an early Mustang C4 therefore you should be able to reuse your old driveshaft and yoke. The only upgrades to this kit would be a SFI flexplate, cast aluminum pan, speedometer housing parts, wiring harness and oil. The $4.00 per gallon gas will feel like $2.80 per gallon gas with an overdrive conversion.

Other parts you may need for your conversion.

Notice the Holley adapter on the carburetor and the helper return spring on the throttle valve bottom lever. On a stock AOD the correct pressure adjustment usually is minimum throttle valve cable pull at minimum throttle opening (idle) and on an AOD with a Shift Kit installed the correct setting usually is full cable pull at full throttle. If you have a Holley or Edelbrock you must have an adapter installed.